Transient response of partially-bonded sandwich plates subject to underwater explosions

Article type: Research Article

Authors: Liu, Zhanke | Young, Yin L. | Motley, Michael R.

Affiliations: Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ, USA | Department of Naval Architecture and Marine Engineering, University of Michigan, Ann Arbor, MI, USA

Note: [] Corresponding author. E-mail: [email protected]

Abstract: This paper investigated the influence of interfacial bonding on the transient response of sandwich plates subject to underwater explosions. It was found that un-bonded sandwich plates receive lower impact energy, and are able to dissipate more energy through plastic deformation of the foam core, than perfectly bonded plates. Consequently, interfacial de-bonding leads to lower net energy transfer from the explosion to the target structure although it also increases the structural deformation due to stiffness reduction. Parametric studies showed that the advantage (diminishing of net energy transfer) is more significant than the disadvantage (magnification of the interface deflection). Thus, interfacial de-bonding through active/passive mechanisms may be beneficial for blast-resistant designs.

Keywords: Sandwich structures, fluid-structure interactions, underwater explosions, interface bonding, shock mitigation

DOI: 10.3233/SAV-2010-0508

Journal: Shock and Vibration, vol. 17, no. 3, pp. 233-250, 2010